(Advanced Ceramics and Smart Glasses)
CdSMATERIALS AND NANOTECHNOLOGY
Codice825II
CFU6
PeriodoPrimo semestre
LinguaInglese
Students will have acquired knowledge about the fundamental theory, properties, manufacturing and applications of ceramics (traditional and advanced), ceramic matrix composites, traditional and smart glasses.
Knowledge will be assessed via:
- ongoing assignments
- final exam
By the end of the course, student will be able to:
- Demonstrate a good understanding of types and properties of ceramics
- Possess knowledge in processing and fabrication of ceramics and ceramic matrix composites
- Understand chemical-physical-mechanical behaviors of ceramicss
- Demonstrate capability of to understand scientific articles focus on ceramics.
Skills will be assessed via:
- ongoing assignments (exercise or other lectures)
- final exam
After completing the course the student will be able to:
- Explain the definition of physical properties of ceramic materials (density, heat capacity, thermal conductivity, thermal expansion), the microstructural characteristics and describe which parameters these properties are dependent on.
- Explain concepts related to mechanical properties of ceramic materials (elasticity, Young's modulus, theoretical strength, tensile strength, compressive strength, bending strength and fracture toughness) and understand the relationship between fracture strength and defects in the material. Make calculations about this.
- Explain how the mechanical properties of ceramics are measured, make calculations about this and explain how the properties of ceramic materials differ from other types of materials (eg metals).
- Explain the toughening mechanisms available and explain how these can be used to increase the fracture toughness of ceramic materials.
- Describe the process of how ceramic materials are produced from powder synthesis to the firing of the green bodies to achieve a dense material
- Describe processes for the preparation of ceramic matrix composites
- Understand the importance of how the preparation process affects the properties of the finished product
- Describe typical properties of different ceramic materials and compare these with other types of materials.
- Describe how glasses and glass ceramics are prepared.
- Understand how finite size effect influences the properties of ceramics
Behaviors will be assessed via:
- ongoing assignments (excercises)
- final oral exam
Knowledge about material science and technology.
The teaching is based on lectures, exercises and case study analysis.
Lectures: 48 hours
Ceramic theory
- General properties, classification of ceramics (traditional and advanced ceramics), oxides, non-oxides and composites, amorphous and crystalline.
- Ceramic microstructures: crystal chemistry, bond energy and properties. Types of imperfections in ceramics, Frenkel and Schottky defects, Kroger–Vink notation.
- Ceramic phase diagrams.
- Main properties of ceramic materials: porosity, mechanical - thermal, chemical and functional properties. Structure-properties correlations. Durability in ceramic materials.
Main characterisation techniques for ceramic materials
- Optical and electron microscopy
- EDS spectroscopy
- IR spectroscopy
- X-ray diffractometry
- Mercury intrusion porosimetry
- Thermogravimetrical analyses (TGA)
- Mechanical characterizations.
Raw materials
Silicates (silica, clays, feldspar) and non-silicates raw materials. Characterization of raw materials for ceramics: chemical composition, mineralogical structure, granulometry, rheology, physical and thermal properties.
Ceramic production processes
- Mixing, grinding, homogenization, wet and dry processing.
- Forming/shaping process: powder pressing, wet molding, casting and extrusion.
- Sintering: theory and applications.
Special focus on sanitary ware production.
Advanced Ceramics and ceramic matrix composite
Examples, applications (structural, biomedical, aerospace...) and production processes.
Advanced Ceramics: Alumina, Zirconia, Silicon carbide, Silicon nitride, Hydroxyapatite.
Ceramic Matrix Composites: SiC-SiC, C-C, C-SiC, Alumina-Alumina (some examples).
Basic mechanism of mechanical properties.
Special focus on Microwave Assisted Chemical Vapour Infiltration (MWCVI) of silicon carbide composites.
Zirconia based ceramics
Introduction what is zirconia, powder production process, aging and solutions, forming methods (die pressing, cold isostatic pressing, hot isostatic pressing, slip casting, extrusion, injection molding, tape casting), heating (dewaxing, pre-sintering, sintering, machining), applications (mechanical, electrical, automotive, medical, energy production, luxury).
Ceramics for biomedical applications:
- Calcium phosphate-based ceramics as bone substitute material
- Zirconia for dental applications
- Bioactive glass and bioceramic based composites for clinical applications
Smart Glasses
History and definitions of glass materials, theories for glass formation, properties (optical and chemical properties, viscosity), characterization, production (traditional and smart glasses). Smart glass technologies and applications (flat glass, laminated glass, heat strengthened glass, chemically strengthened glass, self-cleaning glass, photochromic and thermochromic glasses, PDLCs smart glass).
- Callister's Materials Science and Engineering, William D. Callister, Jr., David G. Rethwisch, John Wiley & Sons (2020)
- Ceramic Processing and Sintering, M.N. Rahaman, Ed. Taylor & Francis (2003)
- Notes, Digital compendium and slides will be provided by the teachers.
Contact the teacher for the didactical material and course information.
The exam is made up of one written test and one oral test.
The written test consists of one or more questions, exercises and problems to solve. If the written test is passed with a grade higher than 18, it is possible to confirm the grade of the written test without taking the oral test.
The oral test consists of an interview between the candidate and the lecturer and co-teachers.